Boat-hull construction



Aug. 2, 1927. ,637,973

- 'C. J. THOMPSON BOAT HULL CONSTRUCTION WIT ESS- Patented Aug. 2, 1927.

UNITED STATES CHRISTIAN J. THOMPSON, OF PESHTIGO, WISCONSIN.

BOAT-HULL CONSTRUCTION.

This invention relates to improvements in ships, the general object ofthe invention being to provide a method of and means for building a shipwhereby calking of the seams is unnecessary, due to the arrangement ofthe planking.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claim.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the sev-,

eral views, and in which Figure 1 is a sectional view through a portionof a ships hull, showing how the invention is carried out.

Figure 2 isa sectional detail view, showing how the planking is operatedupon to make the watertight joint between each pair of planks.

Figure 3 is a section on line 33-of Figure 2,.

Figure 4 is a sectionon line H of Figure 2.

Figure 5, is a section 011 line 55 of Figure 2.

' Figure 6 is a sectional view through a plank, showing how thecompressed portion will expand after being wet.

As shown in these views, the planks l which are fastened to the ribs 2of the hull are each formed with a concaved edge 3 and a convex edge 4:,the edge 4 of one plank fitting in the concavity 3 of the next plank,which tends to make a watertight joint. The convex edge has itslongitudinal center compressed, as at 6, though this must be done insuch a manner that no depression is formed. Figure 2 shows one manner offorming this compressed part. The plank is Application filed November 6,1925. Serial No. 67,358.

first passed under the disk 7 or other arrangement which forms'a groove8 in the top edge of the plank, as shown in Figure 4, thisdisk or otherarrangementcompressing the fibers in forming the groove, as shown inFigures 2 and 4. Then the planer sticker or moulder disk 9 engages theplank and rounds it off, as shown in Figure 5. This removes the groovebut leaves a strip of the compressed part at the top of the roundedoffportion. When this compressed strip becomes saturated with water, itwill expand to its original state, as shown at 6 inFigare 1, but whenthe planks are placed together as in Figure 1, the full expansion of thestrip is, of course, prevented, but this expansion will form a tightjoint between "the planks so that the hull will be watertight and therewill be no necessity for calking the seams.

lVith this invention, a boats hull can be constructed quickly and withlittle expense and the hull will be thoroughly watertight.

It is thought from the'foregoing description that the advantages andnovel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the constructionand in the combination and arrangement of the several parts, providedthat such changes fall within the scope of the appended claim.

What I claim is A ship having its hull planks each formed of a concavityin one edge and its other edge convex, the convex edge of one plankfitting in the concavity of another plank and the convex edge having acompressed portion extending through the longitudinal center thereofwhich will expand when it becomes wet the outer face of the compressedportion forming a portion of the convex edge before said portion isexpanded.

In testimony whereof I aliix my signature.

CHRISTIAN J. THOMPSON.

